Cutter-head for matching lumber



(No Model.)

C. E. ZIMMERMANN. GUTTER HEAD FOR MATCHING LUMBEB..

No. 414,473. Patented Nov. 5, 1889.

UNITED STATES PATENT ErrcE.

CHARLES E. ZMMERMANN, OF SYRAOUSE, NEWT YORK.

CUTTER-HEAD FOR MATCHING LUMBER.

SPECIFICATION forming part of Letters Patent No. 414,473, dated November 5, 1889. Application filed February 4, 1889. Serial No. 298,566. (No model.)

To @ZZ whom it may concern.-

Be it known that I, CHARLES E. ZIMMER- MANN, of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Cutter-Heads for Matching Lumber, of which the following, taken in connection with the accompanying` drawings, is a full, clear, and exact description.

This invention consists in the improved attachment of the cutters to the cutter-head, whereby said cutters are thoroughly braced, so as to preven t theirbein g broken or allowed to tremble or be twisted out of line during their operation.

The invention also consists in providing the cutter-head with screw-threaded sockets at opposite sides for the reception ot the bolts by which the sustaining-sleeve is secured to the cutter-head, and thus allowing the said sleeve to be attached to either side of the cutter-head and the latter to be adjusted for either right or left hand cutting, as may be desired, all as hereinafter more fully described, and specifically set forth in the claims.

In the annexed drawings, Figure 1 is a top view of a cutter-head equipped with grooving-cutters. Fig. 2 is a side view of the same, and Figs. 3 and 4: are detached plan and side views of a tonguing-cuttcr and its attachment to the cutter-head.

Similar letters of reference indicate corresponding parts.

A represents the rotary cutter-head, which is mounted usually on an upright arbor (not shown) and sustained thereon by the sleeve s, lrigidly secured to the cutter-head and embracing the end of the arbor. By means of a set-screw u., inserted in the upper end of the aforesaid sleeve and bearing on the end' of the arbor, the cutter-head is sustained at the requisite distance from the worktable or bed of the machine to cut the tongue or groove in the required position on the edge of the board.

To render the cutter-head reversible, so as to allow it to be operated Yto cut either right or left handed, I provide said cuttenhead with screw-threaded sockets a a a in opposite sides and attach the sleeve by bolts i' t' e', passing through perforated ears s s on the sleeve and entering the sockets at the desired side of the head A. The head A is formed with laterally-proj ecting arms a a, a, having straight radial faces in planes parallel with the axis of the cutter-head. To said faces are attached the cutters O C C, which are curved slightly eccentrically in relation to the axis of the cutter-head and in a plane at right angles to the said axis, and have integral with their heel ends attaching-Shanks c c c, which project from the concave sides of the cutters and are secured to the radial faces of the arms a c a by means of bolts b b b, passing through said shanks and arms. The arm a reaches beyond the junction of the shank c and cutter C, so as vto form a bearing on the heel of the cutter, which bearing extends to a point in range With the nearest outer face of the cutter. Said bearing braces the cutterso effectually as to prevent its trembling and breale ing when in operation. At the same time the inner end of the cutter-shank c rests with a square face against the cutter-head, and thus prevents the cutter from being twisted out of line. `The free ends of the cutters are beveled on their inner sides to cutting-edges e e e on the exterior thereof.

The outer faces of the cutters C C C are nearer to the axis of the cutter-head at the heels of the cutters than at the cutting ends thereof, for the purpose of affording proper clearance to prevent undue friction between the cutters and board operated on. In order to sustain the cutters still more eftectually in their operative position, the arms a ci a. may be provided with grooves Z Z Z and the cuttershanks c c c with tenons 7i 7L 71,., which enter said grooves.

For tonguing lumber l form the cutters with longitudinal grooves in their outer faces, which grooves are of a depth equal to the height of the tongue to be formed on the edge of the board. For grooving lumber I form the cutters with longitudinal tongues t t t on their exteriors, said tongues extending beyond the cutting-edges of the portions of the cut ters at opposite sides of the tongues, and the bevels on the inner sides of the cutters are continued to the ends of the tongues to form the necessary cutting-edges thereon.

IOC)

In order to provide for a proper'clearance of said cutter-sections, I set them obliquely to the line of cutting, as shown in Fig. 5.

l. The combination of the cutter-head A, formed with laterally-preiecting` arms a a, a, having,` straight radial faces, and the cutters C C C, curved slightly eccentric in relation to the axis of the cutter-head and formed With the Shanks c c c, and seated 'thereby on the radial faces of the aforesaid arms and braced by the ends of said shanks resting on the cutter-head, substantially as described and shown.

2. The combination of the cutter-head A, formed with laterallyprojecting arms a a a, having straight radial faces, and the cutters C C C.l curved slightly eccentric in relation to the axis of the cutter-head and formed with the Shanks c o c, and seated thereby on the radial faces of the aforesaid arms and braced by the ends of the aforesaid arms bearing on the heels of the cutters at points in range with the nearest outer faces of the cutters, substantially as described and shown.

3. The combination of the cutter-head provided With screw-threaded sockets a a d at opposite sides, and the sleeve s, detachably secured to the cutter-head by bolts 7,' t' t', substantially as described and shown.

In testimony whereof I have hereunto signed my name this 2d day of February, 1889.

CHARLES E. ZIMMERMNN. [L s] lVitnesses:

J. J. LAAss, C. L. BENDIXON. 

